The dictat is from the AFB however the implementation will be open to interpretation.
Do you arrive on sqn in blues, change to growbag to fly, change to blue when standing in as auth, to growbag for the sim, to blues to SHQ to . . .
On some stations the answer will be yes and on others will be no.
I lay odds that one of my teams will pitch up in CS95 tomorrow as I guess they don't have denims and anyway denims are wholly impracticable for the work they are to do.
Bet my brown job turns up in greens too.